The answer is military conquest :)
President Woodrow Wilson felt the most important & significant of his Fourteen Points statement was the creation of the League of Nations.
The good sailor and the soul of his ship who believed it was a whale and was after it was D. Commander Farragut, in the book 20,000 leagues under the sea.
This is mainly a personal preference question but I think that the Federal Gov. should be more involved with the states. It really depends on what specific "thing" you are talking about.
Go into details. Look at the different issues with both the Federal and State Governments and then compare and contrast that.